Well if this isn't justification to have Pansy executed, to create a horcrux for Hermione...than I don't know what is. I don't see the Parkinson's desiring to save their daughter in the face of losing their standing, she is after all an abject failure....
With Hermione having a horcrux, Harry will be sure to follow and create one of his own thus ensuring the brotherhood's ultimate goal is achieved of recruiting him.
Thanks for writing,
Do you think it will be that easy? There's a reason why it's the 'brotherhood'